Convert Google Analytic ga:yearweek to a date using python.

ga_yearweek_to_date.py

def ga_yearWeek_to_date(yearweek):
    '''
    Convert from Google Analytic ga:yearweek to a date at the start of
    the time period.
    e.g.:
        >> ga_yearWeek_to_date('201353')
        >> 2013-12-29
    '''

    year, week = int(yearweek[:4]), int(yearweek[4:])

    start_of_year = date(year, 1, 1)

    days = 7 * (week - 1) - (start_of_year.isoweekday() % 7)
    
    days = max(0, days)  # GA restarts yearWeek on a new year 

    d = start_of_year + timedelta(days=days)

    return d

Thank you, super helpful!